抄録
In order to find out the suitable condition to carry out vascular anastomosis by microsurgical technique with CO2 laser, the following study was carried out.
Carotid arteries of rabbits, 1.8-2.1mm in diameter and those of guinea pigs, 0.8-1.1mm in diameter were subjected to vascular anastomosis. Following exposure of the carotid artery, it was divided between clamps. Under microscope, 3-6 stay sutures with 10-0 nylon filament were placed in end to end fashion to approximate the vascular ends. Then, CO2 laser irradiation was carried out under the above mentioned condition. Completing the anastomosis, the blood flow was restored. Macroscopic study of the site of anastomosis about hemorrhage, rupture, thrombus, stenosis and aneurysmal dilatation were made postoperatively.
CO2 laser irradiation should be done after firm coaptation of the vascular edges are made by stay stitches to obtain a successful vascular anastomosis. Adequate condition for laser irradiation is as follows: power 20-40 mW, power density 1.5-2.5J/mm2. Using this method, the anastomosis can be accomplished easier and faster than that by conventional vascular anastomosis.
